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Electric Traction

Electric Traction
If the coefficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails?

0.46
0.26
0.16
0.35

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Electric Traction
Battery operated trucks are used in

Steel mills
Factories for material transportation
Narrow gauge traction
Power stations

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Electric Traction
For three-phase induction motors which of the following is the least efficient method of speed control?

Combination of cascade and pole changing
Cascade control
Rheostat control
Pole changing

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Electric Traction
Which of the following state capitals (in India) is not on broad gauge track?

Chandigarh
Jaipur
Bhopal
Lucknow

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Electric Traction
Specific energy consumption becomes

All of the listed here
More on steeper gradient
Less if distance between stops is more
More with high train resistance

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Electric Traction
Series motor is not suited for traction duty due to which of the following account?

Less current drain on the heavy load torque
Self relieving property
Current surges after temporary switching off supply
Commutating property at heavy load

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